fix: optional port for nod schema

apisix/schema_def.lua

@@ -325,7 +325,7 @@ local nodes_schema = {
                         type = "object",
                     }
                 },
-                required = {"host", "port", "weight"},
+                required = {"host", "weight"},
             },
         }
     }

t/admin/schema-validate.t

@@ -398,3 +398,42 @@ location /t {
 --- error_code: 400
 --- response
 {"error_msg":"allOf 1 failed: value should match only one schema, but matches none"}
+
+
+
+=== TEST 13: Check node_schema optional port
+--- config
+    location /t {
+        content_by_lua_block {
+            local t = require("lib.test_admin").test
+            local code, body = t('/apisix/admin/routes',
+                ngx.HTTP_POST,
+                {
+                    uri = "/ip",
+                    upstream = {
+                        type = "roundrobin",
+                        nodes = {
+                            { host = "nghttp2.org", weight = 1,}
+                        }
+                    },
+                    methods = {"GET"},
+                }
+            )
+
+            if code >= 300 then
+                ngx.status = code
+            end
+            ngx.say(body)
+
+        }
+    }
+--- request
+GET /t
+--- response_body
+passed
+
+
+
+=== TEST 14: Test route upstream
+--- request
+GET /ip